Quote from the Thermal Expansion ChangeLog Section on the forums: http://www.minecraftforum.net/…s-thermal-expansion-3000/
MJ is no longer supported by Thermal Expansion. The new energy system is Redstone Flux. (RF). Ratio is 10:1 RF:MJ.
Lots of mods already support Redstone Flux - it is now the most widely adopted energy system in modded Minecraft!
Right now I am using this: https://github.com/zerotheliger/PowerConverters/
But I would like to use yours instead, but I haven't seen any RF support planned in your 'What needs to be done:' list.. Is this planned?